1999+999*999的简便计算
人气:178 ℃ 时间:2020-03-31 02:10:40
解答
1999+999×999
=1000+999+999×999
=1000+999×(1+999)
=1000+999×1000
=1000×(999+1)
=1000×1000
=1000000
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